/**
 *
 * @author Yasya
 */
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package delta.productcatalog.web;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import delta.productcatalog.web.reportingOnOrders.ExportRepToExcel;
import delta.reporting.PopularProducts;
import facade.ProductFacadeLocal;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import javax.ejb.EJB;
import javax.servlet.annotation.HttpConstraint;
import javax.servlet.annotation.ServletSecurity;
import javax.servlet.http.HttpSession;

@ServletSecurity(
@HttpConstraint(rolesAllowed = {"Administrator", "Warehouse Employee"}))
@WebServlet(name = "ReportPopularProduct", urlPatterns = {"/ReportPopularProduct"})
public class ReportPopularProduct extends HttpServlet {
    @EJB
    private ProductFacadeLocal productFacade;
    

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        HttpSession session = request.getSession();
        int qu = getIntegerQuantity((String) session.getAttribute("quantityProd"));
        List<String> names = new ArrayList<String>();
        List<BigDecimal> prices = new ArrayList<BigDecimal>();
        List<Integer> counts = new ArrayList<Integer>();
        for(PopularProducts p: productFacade.findPopularProducts(qu + 1)){
            names.add(p.getName());
            prices.add(p.getPrice());
            counts.add(p.getCount());
        }
        ExportRepToExcel exp = new ExportRepToExcel();
        exp.exportRepOnProducts(names, prices, counts);
        ExportRepToExcel.automaticallyOpenFile(ExportRepToExcel.getRepProductFileName());
        response.sendRedirect("popularProductsReport.jsp");
    }

    private int getIntegerQuantity(String quantity){
        if(quantity == null || quantity.equals("")){
            return 10;
        }
        else{
            return Integer.parseInt(quantity);
        }
    }
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
